I just slice them into small bite size portions, spray some olive oil very lightly, bake them at a low temperature. I actually make them for myself, but as the ingredients are all natural I give it to my babies..
I tried using my dehydrator once and left the thinly sliced potatoes overnight. It was a great treat for the dogs, but I can't eat them myself when I'm feeling peckish, as it loses some of the taste..
Plus you can't beat the sight of those adorable sitting in front of the oven, waiting for their treat..